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X2 plus 3x plus 7 equals 5?

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โˆ™ 2010-02-25 04:35:18

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x2 + 3x + 7 = 5

∴ x2 + 3x + 2 = 0

∴ (x + 1)(x + 2) = 0

∴ x ∈ {-2, -1}

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โˆ™ 2010-02-25 04:35:18
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